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Will Velux windows allow rainfall and condensation into my loft conversion?

Will Velux windows allow rainfall and condensation into my loft conversion?

Certainly not. Some Velux windows known as Smart Windows do more than let in light and ventilation. They have the ability to open and close automatically depending on the temperature or weather. They are powered either by the mains or by the sun and come with a rain sensor so that once it starts raining, the windows automatically close.